Date Added: Sep 2009
New rapid developments in the telecommunication technologies present new challenges for protecting the information from unauthorized access. It has intensified the research activities in the field of cryptography to fulfill the strong demand of the new secure cryptographic techniques. This paper deals with the image encryption scheme based on non-linear dynamic chaotic system in stream cipher architecture. The narrowing of the numbers domain interval to [0.2, 0.8] and a double precision floating point format to encode float numbers to binary format were used for pseudo random stream generator. The results of the NIST statistical test suite and security analysis are given. The results show very good cryptographic properties and high security.